Choose the correct statement(s) among the following.
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a
SnCl2.2H2O is a reducing agent
b
SnO2 reacts with KOH to form K2[Sn(OH)6].
c
A solution of PbCl2 in HCl contains Pb2+ and Cl− ions.
d
The reaction of Pb3O4 with hot dilute nitric acid to give PbO2 is a redox reaction.
answer is A.
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Detailed Solution
1) SnCl2⋅2H2O is a reducing agent since Sn2+ tends to convert into Sn4+.2) SnO2 (Amphoteric) +2KOH(aq.) (Base )+2H2O⟶K2Sn(OH)63) First group cations (Pb2+) form insoluble chloride with HCl that is PbCl2 however it is slightly soluble in water and therefore lead +2 ion is never completely precipitated on adding hydrochloric acid in test sample of Pb2+, rest of the Pb2+ ions are quantitatively precipitated with H2S in acidic medium. So that we can say that filtrate of first group contain solution of PbCl2 in HCl which contains Pb2+ and Cl– However in the presence of conc. HCl or excess HCl it can produce H2[PbCl4] So, we can conclude 1, 2 or 1,2,3 should be answers. 4) Pb3O42PbO.PlbO2 (mixture of oxides) +4HNO3⟶PbO2(↓)+2PbNO32+2H2O It is not a redox reaction